beak

Blue-tit Parus caeruleus male on a branch

Blue tit Parus caeruleus, Coal tit, Long tailed tit, and great tits in a Scots pine tree with cowslip and snakeshead fritillary growing underneath

Blue tit Parus caeruleus adult feeding chicks inside a bird box

Blue tit Parus caeruleus visiting a bird box

Bohemian Waxwing Bombycilla garrulus perched on a twig of rowan with orange berries

Bullfinch Pyrrhula pyrrhula male

Buzzard Buteo buteo at rest on a branch

Canada goose Branta canadensis

Hand holding a duck egg and a candle to see whether or not the egg is viable as egg becomes translucent

Chaffinch Fringilla coelebs male in amongst grasses

Coal tit Periparus ater perched on a twig covered with lichen including Usnea species